The answer is B, the vector represents magnitude and direction
Answer:
Radiation , Conduction and Convection
Explanation:
Those are the ways heat is transferred
True. The speed of any object will have faster acceleration, and eventually slow down due to gravity.
First of all, let's write the equation of motions on both horizontal (x) and vertical (y) axis. It's a uniform motion on the x-axis, with constant speed

, and an accelerated motion on the y-axis, with initial speed

and acceleration

:


where the negative sign in front of g means the acceleration points towards negative direction of y-axis (downward).
To find the distance from the landing point, we should find first the time at which the projectile hits the ground. This can be found by requiring

Therefore:

which has two solutions:

is the time of the beginning of the motion,

is the time at which the projectile hits the ground.
Now, we can find the distance covered on the horizontal axis during this time, and this is the distance from launching to landing point:
Water is a really good conductor of sound so I would have to say that it would be to send the message underwater because a more dense medium produces a louder sound